include/items.php

   1 <?php
   2
   3 require_once('bbcode.php');
   4
   5 function get_feed_for(&$a, $dfrn_id, $owner_id, $last_update, $direction = 0) {
   6
   7
   8         // default permissions - anonymous user
   9
  10         $sql_extra = "
  11                 AND `allow_cid` = ''
  12                 AND `allow_gid` = ''
  13                 AND `deny_cid`  = ''
  14                 AND `deny_gid`  = ''
  15         ";
  16
  17         if(strlen($owner_id) && ! intval($owner_id)) {
  18                 $r = q("SELECT `uid`, `nickname` FROM `user` WHERE `nickname` = '%s' LIMIT 1",
  19                         dbesc($owner_id)
  20                 );
  21                 if(count($r)) {
  22                         $owner_id = $r[0]['uid'];
  23                         $owner_nick = $r[0]['nickname'];
  24                 }
  25         }
  26
  27         $r = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
  28                 intval($owner_id)
  29         );
  30         if(count($r))
  31                 $owner = $r[0];
  32         else
  33                 killme();
  34
  35         if($dfrn_id && $dfrn_id != '*') {
  36
  37                 $sql_extra = '';
  38                 switch($direction) {
  39                         case (-1):
  40                                 $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
  41                                 $my_id = $dfrn_id;
  42                                 break;
  43                         case 0:
  44                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  45                                 $my_id = '1:' . $dfrn_id;
  46                                 break;
  47                         case 1:
  48                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  49                                 $my_id = '0:' . $dfrn_id;
  50                                 break;
  51                         default:
  52                                 return false;
  53                                 break; // NOTREACHED
  54                 }
  55
  56                 $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 AND `contact`.`uid` = %d $sql_extra LIMIT 1",
  57                         intval($owner_id)
  58                 );
  59
  60                 if(! count($r))
  61                         return false;
  62
  63                 $contact = $r[0];
  64                 $groups = init_groups_visitor($contact['id']);
  65
  66                 if(count($groups)) {
  67                         for($x = 0; $x < count($groups); $x ++)
  68                                 $groups[$x] = '<' . intval($groups[$x]) . '>' ;
  69                         $gs = implode('|', $groups);
  70                 }
  71                 else
  72                         $gs = '<<>>' ; // Impossible to match
  73
  74                 $sql_extra = sprintf("
  75                         AND ( `allow_cid` = '' OR     `allow_cid` REGEXP '<%d>' )
  76                         AND ( `deny_cid`  = '' OR NOT `deny_cid`  REGEXP '<%d>' )
  77                         AND ( `allow_gid` = '' OR     `allow_gid` REGEXP '%s' )
  78                         AND ( `deny_gid`  = '' OR NOT `deny_gid`  REGEXP '%s')
  79                 ",
  80                         intval($contact['id']),
  81                         intval($contact['id']),
  82                         dbesc($gs),
  83                         dbesc($gs)
  84                 );
  85         }
  86
  87         if($dfrn_id === '' || $dfrn_id === '*')
  88                 $sort = 'DESC';
  89         else
  90                 $sort = 'ASC';
  91
  92         if(! strlen($last_update))
  93                 $last_update = 'now - 30 days';
  94
  95         $check_date = datetime_convert('UTC','UTC',$last_update,'Y-m-d H:i:s');
  96
  97         $r = q("SELECT `item`.*, `item`.`id` AS `item_id`,
  98                 `contact`.`name`, `contact`.`photo`, `contact`.`url`,
  99                 `contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
 100                 `contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`,
 101                 `contact`.`id` AS `contact-id`, `contact`.`uid` AS `contact-uid`
 102                 FROM `item` LEFT JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
 103                 WHERE `item`.`uid` = %d AND `item`.`visible` = 1
 104                 AND `item`.`wall` = 1 AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
 105                 AND ( `item`.`edited` > '%s' OR `item`.`changed` > '%s' )
 106                 $sql_extra
 107                 ORDER BY `parent` %s, `created` ASC LIMIT 0, 300",
 108                 intval($owner_id),
 109                 dbesc($check_date),
 110                 dbesc($check_date),
 111                 dbesc($sort)
 112         );
 113
 114         // Will check further below if this actually returned results.
 115         // We will provide an empty feed in any case.
 116
 117         $items = $r;
 118
 119         $feed_template = load_view_file('view/atom_feed.tpl');
 120         $tomb_template = load_view_file('view/atom_tomb.tpl');
 121         $item_template = load_view_file('view/atom_item.tpl');
 122         $cmnt_template = load_view_file('view/atom_cmnt.tpl');
 123
 124         $atom = '';
 125
 126
 127         $atom .= replace_macros($feed_template, array(
 128                         '$feed_id'      => xmlify($a->get_baseurl() . '/profile/' . $owner_nick),
 129                         '$feed_title'   => xmlify($owner['name']),
 130                         '$feed_updated' => xmlify(datetime_convert('UTC', 'UTC', $updated . '+00:00' , ATOM_TIME)) ,
 131                         '$name'         => xmlify($owner['name']),
 132                         '$profile_page' => xmlify($owner['url']),
 133                         '$photo'        => xmlify($owner['photo']),
 134                         '$thumb'        => xmlify($owner['thumb']),
 135                         '$picdate'      => xmlify(datetime_convert('UTC','UTC',$owner['avatar-date'] . '+00:00' , ATOM_TIME)) ,
 136                         '$uridate'      => xmlify(datetime_convert('UTC','UTC',$owner['uri-date']    . '+00:00' , ATOM_TIME)) ,
 137                         '$namdate'      => xmlify(datetime_convert('UTC','UTC',$owner['name-date']   . '+00:00' , ATOM_TIME))
 138         ));
 139
 140
 141         if(! count($items)) {
 142                 $atom .= '</feed>' . "\r\n";
 143                 return $atom;
 144         }
 145
 146         foreach($items as $item) {
 147
 148                 // public feeds get html, our own nodes use bbcode
 149
 150                 if($dfrn_id === '*') {
 151                         $item['body'] = bbcode($item['body']);
 152                         $type = 'html';
 153                 }
 154                 else {
 155                         $type = 'text';
 156                 }
 157
 158                 if($item['deleted']) {
 159                         $atom .= replace_macros($tomb_template, array(
 160                                 '$id'      => xmlify($item['uri']),
 161                                 '$updated' => xmlify(datetime_convert('UTC', 'UTC', $item['edited'] . '+00:00' , ATOM_TIME))
 162                         ));
 163                 }
 164                 else {
 165                         $verb = construct_verb($item);
 166                         $actobj = construct_activity($item);
 167
 168                         if($item['parent'] == $item['id']) {
 169                                 $atom .= replace_macros($item_template, array(
 170                                         '$name'               => xmlify($item['name']),
 171                                         '$profile_page'       => xmlify($item['url']),
 172                                         '$thumb'              => xmlify($item['thumb']),
 173                                         '$owner_name'         => xmlify($item['owner-name']),
 174                                         '$owner_profile_page' => xmlify($item['owner-link']),
 175                                         '$owner_thumb'        => xmlify($item['owner-avatar']),
 176                                         '$item_id'            => xmlify($item['uri']),
 177                                         '$title'              => xmlify($item['title']),
 178                                         '$published'          => xmlify(datetime_convert('UTC', 'UTC', $item['created'] . '+00:00' , ATOM_TIME)),
 179                                         '$updated'            => xmlify(datetime_convert('UTC', 'UTC', $item['edited']  . '+00:00' , ATOM_TIME)),
 180                                         '$location'           => xmlify($item['location']),
 181                                         '$type'               => $type,
 182                                         '$alt'           => xmlify($a->get_baseurl() . '/display/' . $owner_nick . '/' . $item['id']),
 183                                         '$content'            => xmlify($item['body']),
 184                                         '$verb'               => xmlify($verb),
 185                                         '$actobj'             => $actobj,  // do not xmlify
 186                                         '$comment_allow'      => ((($item['last-child']) && ($contact['rel']) && ($contact['rel'] != REL_FAN)) ? 1 : 0)
 187                                 ));
 188                         }
 189                         else {
 190                                 $atom .= replace_macros($cmnt_template, array(
 191                                         '$name'          => xmlify($item['name']),
 192                                         '$profile_page'  => xmlify($item['url']),
 193                                         '$thumb'         => xmlify($item['thumb']),
 194                                         '$item_id'       => xmlify($item['uri']),
 195                                         '$title'         => xmlify($item['title']),
 196                                         '$published'     => xmlify(datetime_convert('UTC', 'UTC', $item['created'] . '+00:00' , ATOM_TIME)),
 197                                         '$updated'       => xmlify(datetime_convert('UTC', 'UTC', $item['edited']  . '+00:00' , ATOM_TIME)),
 198                                         '$type'          => $type,
 199                                         '$content'       => xmlify($item['body']),
 200                                         '$alt'           => xmlify($a->get_baseurl() . '/display/' . $owner_nick . '/' . $item['id']),
 201                                         '$verb'          => xmlify($verb),
 202                                         '$actobj'        => $actobj, // do not xmlify
 203                                         '$parent_id'     => xmlify($item['parent-uri']),
 204                                         '$comment_allow' => (($item['last-child']) ? 1 : 0)
 205                                 ));
 206                         }
 207                 }
 208         }
 209
 210         $atom .= '</feed>' . "\r\n";
 211         return $atom;
 212 }
 213
 214
 215 function construct_verb($item) {
 216         if($item['verb'])
 217                 return $item['verb'];
 218         return ACTIVITY_POST;
 219 }
 220
 221 function construct_activity($item) {
 222
 223         if($item['object']) {
 224                 $o = '<as:object>' . "\r\n";
 225                 $r = @simplexml_load_string($item['object']);
 226                 if($r->type)
 227                         $o .= '<as:object-type>' . $r->type . '</as:object-type>' . "\r\n";
 228                 if($r->id)
 229                         $o .= '<id>' . $r->id . '</id>' . "\r\n";
 230                 if($r->link)
 231                         $o .= '<link rel="alternate" type="text/html" href="' . $r->link . '" />' . "\r\n";
 232                 if($r->title)
 233                         $o .= '<title>' . $r->title . '</title>' . "\r\n";
 234                 if($r->content)
 235                         $o .= '<content type="html" >' . bbcode($r->content) . '</content>' . "\r\n";
 236                 $o .= '</as:object>' . "\r\n";
 237                 return $o;
 238         }
 239
 240         return '';
 241 }
 242
 243
 244
 245
 246 function get_atom_elements($item) {
 247
 248         require_once('library/HTMLPurifier.auto.php');
 249         require_once('include/html2bbcode.php');
 250
 251         $res = array();
 252
 253         $raw_author = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'author');
 254         if($raw_author) {
 255                 if($raw_author[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'][0]['attribs']['']['rel'] === 'photo')
 256                 $res['author-avatar'] = unxmlify($raw_author[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'][0]['attribs']['']['href']);
 257         }
 258
 259         $author = $item->get_author();
 260         $res['author-name'] = unxmlify($author->get_name());
 261         $res['author-link'] = unxmlify($author->get_link());
 262         if(! $res['author-avatar'])
 263                 $res['author-avatar'] = unxmlify($author->get_avatar());
 264         $res['uri'] = unxmlify($item->get_id());
 265         $res['title'] = unxmlify($item->get_title());
 266         $res['body'] = unxmlify($item->get_content());
 267
 268         $maxlen = get_max_import_size();
 269         if($maxlen && (strlen($res['body']) > $maxlen))
 270                 $res['body'] = substr($res['body'],0, $maxlen);
 271
 272         // It isn't certain at this point whether our content is plaintext or html and we'd be foolish to trust
 273         // the content type. Our own network only emits text normally, though it might have been converted to
 274         // html if we used a pubsubhubbub transport. But if we see even one html open tag in our text, we will
 275         // have to assume it is all html and needs to be purified.
 276
 277         // It doesn't matter all that much security wise - because before this content is used anywhere, we are
 278         // going to escape any tags we find regardless, but this lets us import a limited subset of html from
 279         // the wild, by sanitising it and converting supported tags to bbcode before we rip out any remaining
 280         // html.
 281
 282
 283         if(strpos($res['body'],'<')) {
 284
 285                 $res['body'] = preg_replace('#<object[^>]+>.+?' . 'http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s',
 286                         '[youtube]$1[/youtube]', $res['body']);
 287
 288                 $config = HTMLPurifier_Config::createDefault();
 289                 $config->set('Core.DefinitionCache', null);
 290
 291                 // we shouldn't need a whitelist, because the bbcode converter
 292                 // will strip out any unsupported tags.
 293                 // $config->set('HTML.Allowed', 'p,b,a[href],i');
 294
 295                 $purifier = new HTMLPurifier($config);
 296                 $res['body'] = $purifier->purify($res['body']);
 297         }
 298
 299
 300         $res['body'] = html2bbcode($res['body']);
 301
 302
 303         $allow = $item->get_item_tags(NAMESPACE_DFRN,'comment-allow');
 304         if($allow && $allow[0]['data'] == 1)
 305                 $res['last-child'] = 1;
 306         else
 307                 $res['last-child'] = 0;
 308
 309         $rawcreated = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'published');
 310         if($rawcreated)
 311                 $res['created'] = unxmlify($rawcreated[0]['data']);
 312
 313         $rawlocation = $item->get_item_tags(NAMESPACE_DFRN, 'location');
 314         if($rawlocation)
 315                 $res['location'] = unxmlify($rawlocation[0]['data']);
 316
 317
 318         $rawedited = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'updated');
 319         if($rawedited)
 320                 $res['edited'] = unxmlify($rawcreated[0]['data']);
 321
 322         $rawowner = $item->get_item_tags(NAMESPACE_DFRN, 'owner');
 323         if($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['name'][0]['data'])
 324                 $res['owner-name'] = unxmlify($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['name'][0]['data']);
 325         elseif($rawowner[0]['child'][NAMESPACE_DFRN]['name'][0]['data'])
 326                 $res['owner-name'] = unxmlify($rawowner[0]['child'][NAMESPACE_DFRN]['name'][0]['data']);
 327         if($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['uri'][0]['data'])
 328                 $res['owner-link'] = unxmlify($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['uri'][0]['data']);
 329         elseif($rawowner[0]['child'][NAMESPACE_DFRN]['uri'][0]['data'])
 330                 $res['owner-link'] = unxmlify($rawowner[0]['child'][NAMESPACE_DFRN]['uri'][0]['data']);
 331
 332         if($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'][0]['attribs']['']['rel'] === 'photo')
 333                 $res['owner-avatar'] = unxmlify($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'][0]['attribs']['']['href']);
 334         elseif($rawowner[0]['child'][NAMESPACE_DFRN]['avatar'][0]['data'])
 335                 $res['owner-avatar'] = unxmlify($rawowner[0]['child'][NAMESPACE_DFRN]['avatar'][0]['data']);
 336
 337         $rawverb = $item->get_item_tags(NAMESPACE_ACTIVITY, 'verb');
 338         // select between supported verbs
 339         if($rawverb)
 340                 $res['verb'] = unxmlify($rawverb[0]['data']);
 341
 342         $rawobj = $item->get_item_tags(NAMESPACE_ACTIVITY, 'object');
 343
 344
 345         if($rawobj) {
 346                 $res['object'] = '<object>' . "\n";
 347                 if($rawobj[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data']) {
 348                         $res['object-type'] = $rawobj[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data'];
 349                         $res['object'] .= '<type>' . $rawobj[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data'] . '</type>' . "\n";
 350                 }
 351                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['id'][0]['data'])
 352                         $res['object'] .= '<id>' . $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['id'][0]['data'] . '</id>' . "\n";
 353
 354                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'][0]['attribs']['']['rel'] === 'alternate')
 355                         $res['object'] .= '<link>' . $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'][0]['attribs']['']['href'] . '</link>' . "\n";
 356                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['title'][0]['data'])
 357                         $res['object'] .= '<title>' . $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['title'][0]['data'] . '</title>' . "\n";
 358                 if($rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['content'][0]['data']) {
 359                         $body = $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['content'][0]['data'];
 360                         if(! $body)
 361                                 $body = $rawobj[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['summary'][0]['data'];
 362                         if(strpos($body,'<')) {
 363
 364                                 $body = preg_replace('#<object[^>]+>.+?' . 'http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+).+?</object>#s',
 365                                         '[youtube]$1[/youtube]', $body);
 366
 367                                 $config = HTMLPurifier_Config::createDefault();
 368                                 $config->set('Core.DefinitionCache', null);
 369
 370                                 $purifier = new HTMLPurifier($config);
 371                                 $body = $purifier->purify($body);
 372                         }
 373
 374                         $body = html2bbcode($body);
 375                         $res['object'] .= '<content>' . $body . '</content>' . "\n";
 376                 }
 377
 378                 $res['object'] .= '</object>' . "\n";
 379         }
 380
 381         return $res;
 382 }
 383
 384 function item_store($arr) {
 385
 386 //print_r($arr);
 387
 388
 389         if($arr['gravity'])
 390                 $arr['gravity'] = intval($arr['gravity']);
 391         elseif($arr['parent-uri'] == $arr['uri'])
 392                 $arr['gravity'] = 0;
 393         elseif($arr['verb'] == ACTIVITY_POST)
 394                 $arr['gravity'] = 6;
 395
 396         if(! x($arr,'type'))
 397                 $arr['type'] = 'remote';
 398         $arr['wall'] = ((intval($arr['wall'])) ? 1 : 0);
 399         $arr['uri'] = notags(trim($arr['uri']));
 400         $arr['author-name'] = notags(trim($arr['author-name']));
 401         $arr['author-link'] = notags(trim($arr['author-link']));
 402         $arr['author-avatar'] = notags(trim($arr['author-avatar']));
 403         $arr['owner-name'] = notags(trim($arr['owner-name']));
 404         $arr['owner-link'] = notags(trim($arr['owner-link']));
 405         $arr['owner-avatar'] = notags(trim($arr['owner-avatar']));
 406         $arr['created'] = ((x($arr,'created') !== false) ? datetime_convert('UTC','UTC',$arr['created']) : datetime_convert());
 407         $arr['edited']  = ((x($arr,'edited')  !== false) ? datetime_convert('UTC','UTC',$arr['edited'])  : datetime_convert());
 408         $arr['changed'] = datetime_convert();
 409         $arr['title'] = notags(trim($arr['title']));
 410         $arr['location'] = notags(trim($arr['location']));
 411         $arr['body'] = escape_tags(trim($arr['body']));
 412         $arr['last-child'] = intval($arr['last-child']);
 413         $arr['visible'] = ((x($arr,'visible') !== false) ? intval($arr['visible']) : 1);
 414         $arr['deleted'] = 0;
 415         $arr['parent-uri'] = notags(trim($arr['parent-uri']));
 416         $arr['verb'] = notags(trim($arr['verb']));
 417         $arr['object-type'] = notags(trim($arr['object-type']));
 418         $arr['object'] = trim($arr['object']);
 419
 420         $parent_id = 0;
 421         $parent_missing = false;
 422
 423         dbesc_array($arr);
 424
 425         $r = q("INSERT INTO `item` (`"
 426                         . implode("`, `", array_keys($arr))
 427                         . "`) VALUES ('"
 428                         . implode("', '", array_values($arr))
 429                         . "')" );
 430
 431         // find the parent and snarf the item id and ACL's
 432
 433         $r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 434                 dbesc($arr['parent-uri']),
 435                 intval($arr['uid'])
 436         );
 437
 438         if(count($r)) {
 439                 $parent_id = $r[0]['id'];
 440                 $allow_cid = $r[0]['allow_cid'];
 441                 $allow_gid = $r[0]['allow_gid'];
 442                 $deny_cid  = $r[0]['deny_cid'];
 443                 $deny_gid  = $r[0]['deny_gid'];
 444         }
 445         else {
 446                 $parent_missing = true;
 447         }
 448
 449         $r = q("SELECT `id` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 450                 $arr['uri'],           // already dbesc'd
 451                 intval($arr['uid'])
 452         );
 453         if(count($r))
 454                 $current_post = $r[0]['id'];
 455         else
 456                 return 0;
 457
 458         if($parent_missing) {
 459
 460                 // perhaps the parent was deleted, but in any case, this thread is dead
 461                 // and unfortunately our brand new item now has to be destroyed
 462
 463                 q("DELETE FROM `item` WHERE `id` = %d LIMIT 1",
 464                         intval($current_post)
 465                 );
 466                 return 0;
 467         }
 468
 469         // Set parent id - all of the parent's ACL's are also inherited by this post
 470
 471         $r = q("UPDATE `item` SET `parent` = %d, `allow_cid` = '%s', `allow_gid` = '%s',
 472                 `deny_cid` = '%s', `deny_gid` = '%s' WHERE `id` = %d LIMIT 1",
 473                 intval($parent_id),
 474                 dbesc($allow_cid),
 475                 dbesc($allow_gid),
 476                 dbesc($deny_cid),
 477                 dbesc($deny_gid),
 478                 intval($current_post)
 479         );
 480
 481         return $current_post;
 482 }
 483
 484 function get_item_contact($item,$contacts) {
 485         if(! count($contacts) || (! is_array($item)))
 486                 return false;
 487         foreach($contacts as $contact) {
 488                 if($contact['id'] == $item['contact-id']) {
 489                         return $contact;
 490                         break; // NOTREACHED
 491                 }
 492         }
 493         return false;
 494 }
 495
 496
 497 function dfrn_deliver($contact,$atom,$debugging = false) {
 498
 499
 500         if((! strlen($contact['dfrn-id'])) && (! $contact['duplex']))
 501                 return 3;
 502
 503         $idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);
 504
 505         if($contact['duplex'] && $contact['dfrn-id'])
 506                 $idtosend = '0:' . $orig_id;
 507         if($contact['duplex'] && $contact['issued-id'])
 508                 $idtosend = '1:' . $orig_id;
 509
 510         $url = $contact['notify'] . '?dfrn_id=' . $idtosend;
 511
 512         if($debugging)
 513                 echo "URL: $url";
 514
 515         $xml = fetch_url($url);
 516
 517         if($debugging)
 518                 echo $xml;
 519
 520         if(! $xml)
 521                 return 3;
 522
 523         $res = simplexml_load_string($xml);
 524
 525         if((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id)))
 526                 return (($res->status) ? $res->status : 3);
 527
 528         $postvars     = array();
 529         $sent_dfrn_id = hex2bin($res->dfrn_id);
 530         $challenge    = hex2bin($res->challenge);
 531
 532         $final_dfrn_id = '';
 533
 534         if($contact['duplex'] && strlen($contact['prvkey'])) {
 535                 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 536                 openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
 537         }
 538         else {
 539                 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 540                 openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
 541         }
 542
 543         $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 544
 545         if(strpos($final_dfrn_id,':') == 1)
 546                 $final_dfrn_id = substr($final_dfrn_id,2);
 547
 548         if($final_dfrn_id != $orig_id) {
 549                 // did not decode properly - cannot trust this site
 550                 return 3;
 551         }
 552
 553         $postvars['dfrn_id'] = $idtosend;
 554
 555
 556         if(($contact['rel']) && ($contact['rel'] != REL_FAN) && (! $contact['blocked']) && (! $contact['readonly'])) {
 557                 $postvars['data'] = $atom;
 558         }
 559         else {
 560                 $postvars['data'] = str_replace('<dfrn:comment-allow>1','<dfrn:comment-allow>0',$atom);
 561         }
 562
 563         $xml = post_url($contact['notify'],$postvars);
 564
 565         if($debugging)
 566                 echo $xml;
 567
 568         $res = simplexml_load_string($xml);
 569
 570         return $res->status;
 571
 572 }